64MB/128MB/256MB/512MB Secure Digital Card

Eorex Corporation

www.eorex.com

3/6

Bus Operating Conditions

1. General

Parameter

Symbol

Min.

Max.

Unit

Remark

Peak voltage on all lines

-0.3

VDD+0.3

V

All Inputs

Input Leakage Current

-10

10

µA

All Outputs

Output Leakage Current

-10

10

µA

Parameter

Symbol

Min

Max

Unit

Remark

Supply voltage

2.0

3.6

V

CMD0, 12, 55, ACMD41

commands

Supply voltage specified in OCR register

Except CMD0, 15, 55,

ACMD41 commands

-0.3

0.3

V

Power up time

250

ms

Note: The current consumption of any card during the power-up procedure must not exceed 10mA.

connected to this line:

Where N is the number of connected cards. Requiring the sum of the host and bus

capacitance’s not to exceed 30pF for up to 10 cards, and 40pF up to 30 cards, the following

values must not be exceeded:

Parameter

Symbol

Min

Max

Unit

Remark

Bus signal line capacitance

100

pF

fpp≦20MHz, 7 cards

Signal card capacitance

10

pF

Maximum signal line inductance

16

nH

fpp≦20MHz

Pull-up resistance inside card (pin1)

10

90

KΩ

May be used for card

detection

only since they are connected separately to the SD Memory Card host.

Parameter

Symbol

Min

Max

Unit

Remark

Pull-up resistance

10

100

KΩ

To prevent bus floating

Bus signal line capacitance

250

pF

fpp≦5MHz, 21 cards